Request Details

Route
/slow GET
Timestamp
Sep 23, 2026 6:39 AM
Duration
367.85 ms
Status
200
Response Size
170 KB
Error
No

Performance Breakdown

Database
4.3% (5 queries)
View Rendering
6.0%
Application Logic
89.7%
Other Operations
0.0%
Total Operations
16
Slowest Operation
367.85 ms

Request Trace

How to read this

Each row is a layer of your stack. Many short Database bars means N+1 queries — fix with includes(). A wide Action bar with little Database time means slow Ruby code. A wide View bar usually means a partial rendered in a loop.

Action
View
Database
Other
Action
View
Database
0.0ms 512.6ms 1025.1ms 1537.7ms 2050.2ms

Operations

How to use this

Sort by Impact to find your biggest wins. Click any row for details and optimisation suggestions. The same SQL appearing multiple times is an N+1 — fix with includes(). A single operation above 50% impact is your highest priority.

Operation Duration Impact Timeline Actions
home/index 26 ms 7.1%
home#slow 368 ms 100.0%
SELECT * FROM comments WHERE post_id = ? ORDER BY created_at DESC LIMIT ? 20 ms 5.4%
SELECT name FROM users 10 ms 2.7%
home#slow 368 ms 100.0%
SELECT users.*, COUNT(DISTINCT posts.id) as post_count, COUNT(DISTINCT comments.id) as comment_count, SUM(posts.view_count) as total_views, AVG(posts.view_count) as avg_views, MIN(posts.created_at) as first_post, MAX(posts.created_at) as latest_post FR... 21 ms 5.7%
home#slow 368 ms 100.0%
layouts/application 38 ms 10.3%
home/index 12 ms 3.3%
layouts/application 14 ms 3.8%
layouts/application 27 ms 7.3%
SELECT * FROM comments WHERE post_id = ? ORDER BY created_at DESC LIMIT ? 3 ms 0.8%
home#slow 368 ms 100.0%
users/index 6 ms 1.6%
home#slow 368 ms 100.0%
SELECT users.*, posts.*, comments.*, COUNT(DISTINCT posts.id) as post_count, COUNT(DISTINCT comments.id) as comment_count, AVG(posts.view_count) as avg_views, MAX(comments.created_at) as latest_comment FROM users LEFT JOIN posts ON users.id = posts.use... 34 ms 9.2%